Coal-cracker



nnirnn srATns PATENT orrron.

TowNsEND PooRE, oF CARBONDALE, PENNsYLvANiA.

COAL-CRACKER.

Specification of Letters Patent No. 17,294, dated rMay 12, 1857.

To all whom t may concern Be it known that I, TowNsnNn PooRE, ofCarbondale, in the county of Luzerne and State of Pennsylvania, haveinvented cer tain new and useful Improvements in Machines for CrackingCoal, and which I call Poores Coal-Cracker, and I do hereby declare thefollowing to be a full, clear, and exact description of the constructionand operation of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure lrepresents a perspective view, Fig. 2 represents a vertical longitudinalsection through the same in one of its positions, Fig. 3, represents asimilar section, when the machine is in its opposite position, or as thecrusher rocks in the grated hopper, and Fig. 4, represent-s one sectionof the grating detached from the machine.

Similar letters of reference where they occur in the several figuresdenote like parts of the machine in all of them.

The nature of my invention consists in the combined use of the rockingcrusher, with the grated hopper, part of which hopper is stationary, andpart movable, and working in connection with the crusher, as will `so atthe top and ends. Within this frame A, is hung upon trunnions B, passingthrough or supported in the sides thereof, near their bottom portions, acrusher C. The sides D, of this crusher are of plates of iron, and itscrushing surface is formed of gratings a, a, divided by ribs or bars c,c, and projecting teeth Z9, b, cast or otherwise wrought on said bars orribs c. The general outline of the crusher is of a heart-shape, as shownin Figs. 2 and 3, the crushing surfaces being segments of circles, whosecenters are at opposite corners of said segments, and making as it werean inverted Gothic arch. The sides D, of this crusher, have projectionsE, E, which extend upward, and

Gr, is a cover or cap, closing up the top of the crusher, and held inplace by a rod e, and pin f, as seen in the drawings, and readilyremoved to gain access to the interior of the crusher. The crusher isopen at its lower end, as seen at g, so that the coal which may bedriven through its gratings in the crushing or cracking process, maydrop out below.

rI o the frame A, are permanently or .immovably fixed the gratings'I, I,composed of open squares z', z', and ribs a, n, which as well as theribs c, c, heretofore described are of the peculiar form shown-in thesections Figs. 2, 3, viz: so shaped that the pieces of coal, afterpassing into or through the open squares or spaces for a certaindistance shall not be held by the ribs, but freely pass through. Theribs are of double wedge form, with the butts of the wedges together,and their thicker portion nearer one surface than the other as shown insaid Figs. l and 2. These gratings I, I, are of a concave form, to suitthe convex form of the crusher that works against them, and they extenddownward, and form about one half of the concave, viz the top half.

J, J, are movable gratings hinged at their upper ends by journals m, m,to the sides of the frame A. These movable gratings are hung in closeproximity to the stationary ones I, above them, and so as to form acontinuation of said upper gratings, down to near the bottom of theframe, where an opening h, is left, for the coal to drop through fromthe inside of the crusher; and to the lower ends of these swinginggratings J, J, are connected journals or wrist pins o, o, which projectthrough curved slots p, p, in the frame A. The journals m, and wristpins 0, are connected by a bar K, each, and to these bars, are fastenedrespectively, the lower ends of two connecting rods L, L, the upper endsof which connecting rods are united to a cross rod M,` which passesthrough the projections E, on the crusher. There are slots r, in thebars K, and slots s in the projections E, so that the throw of theswinging gratings J, may be regulated to the extent that is required tobreak the coal, by changing the connecting rods L, in said slots.

The operation of the machine is as f0llows: The coal is thrown in ateach end between the rocking crusher C, and the gratings I, where itreceives its first cracking,

tively, the hinged portion J, is brought upl with a blow, ,by means ofits connections with the cross head or projections E, Vto which thecross head is connected, and thus causes a second breaking or cracking.And, as will be seen in Figs. 2, 3, the eXtreme bottom part of thehinged gratings, come close l up against the Crusher and prevent any`unbroken coal from dropping through there, and thus the coal iscracked', and driven through the squares, of such size as the squareswill admit-there being of course no pieces larger than the area of theopenings-while the screen separates the other sizes afterward. rlheteeth on the Crusher are at the points where the grate bars vcross eachother, and so arranged that a tooth on the Crusher Works opposite thecenter of a space in the other grate, and the coal is thus crackedbetween two resisting points.

Having thus fully described the nature and object of my invention, whatI claim therein as new and desire to secure by Letters Patent is- Y Thecombination of the rocking cracker, with the iXed and swinging gratings,substantially in the manner and for the pose set forth. p

y TOWNSEND POORE. Witnesses:

J. M. Poomi, P. S. JosLIN.

pur-

